Differential gear for motor-vehicles.



F. ELLWEIN.

DIFFERENTIAL GEAR FOR MOTOR VEHICLES. APPLICATION FILED JUNE 7. 1916.

1,241,361. PatentedSept. 25, 191?.

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F, Ellwezn) F. ELLWEIN. DIFFERENTIAL GEAR FOR MOTOR VEHICLES.

' APPLICATION FILEDJUNE Z, ISIS. 13%,361 Pamnmdse t. 25, 1917.

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rnnnnnrcx ELLWEIN, on Kazan, non'rn' nAxo'r DIFFERENTIAL GEAR FOB,MOYIQR-VEHICLES.

Specification of Letters Batent. Pal ented Sept, 25, 1917.

Application filed June 7, 1916. Serial at. 102,245.

To all whom it may concern:

Be 1t known that I, FREDERICK Hazen, in the county of Mercer and Stateof North Dakota, have invented certain new and useful Improvements inDifferential Gears for Motonvehicles; and I'do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to new and useful improvements in differentialgears and the principal object is to provide use on vehicles having afront as Well as a rear drive, thereby increasing the traction of thedevice.

Another object of the invention is to provide a novel form ofdifferential gearing for both the front and rear axles of the vehiclewhich is so constructed as to permit the axle to turn in the same manneras the ordinary type of vehicle axle.

With these and other objects in view, the invention consists in thenovel combination and arrangement of parts which will be fully set forthin the following specification and accompanying drawings, in which:

Figure 1 is a side elevation of the differential housing used for thefront wheel.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 is I a longitudinal sectional view through Fig. 1.

Fig. 4 is a through Fig. 1.

Fig. 5 is an end elevation of Fig. 1.

Fig. 6 is an enlarged detail sectional view through one of the bearingsto more clearly illustrate the details of construction thereof.

Referring to the drawings in detail the housing for the forwarddifferential is designated by the character 43 and comprises thehemispherical body 44 which is formed at diametrically opposite pointswith the tubular axle housing 45. The upper portion of these tubularaxle housings are cut away as at 46 and there is provided ahemispherical cap 47 having the semi-tubular extension 48 formed atdiametrically opposite points which form closures for the cut awayportions 46 of the tubular axle housing 45. Extending upwardly from apoint centrally of thecap 47 is the king pin 49 provided with thereduced threaded extension 50 for the rec ption f he nut by m ans ofwhich the diftransverse sectional view EInwEIN, a citizen of the UnitedStates, residing 'at a device for- 'ings ferential housing. isattachedto the spring 6 above referred to. I A suitable pin designated bythecharacter 51 extends upwardly and into the lower section 44 of thehousing and this pin has threaded on its upper end a suitable'nut 52for-holding the differential driving gear in place on the pin 51. Thisdifferential, driving gear is designated by the, character 58 andconsists of va basinshaped body providedat its upper edge withaplura-lity of gear; teeth and the hub of the gear designated by thenumeral 54 is rotatably'mounted *on the ball and rollerxbear- 55 aroundthe pin 51. The housing 44 is provided with a slot 56 in its rear wallthrough which the drive shaft 57 extends. The drive shaft 57 carries atits extreme rear end the drive gear 58 which meshes with the gear 53 andtransmits the power from the propeller shaft to the differential gearingas will be more fully hereinafter described. Pivotally mounted on thepin 49 and the pin 51 at points above and below the body 44 and cap 47is the cover or dust cap 59 which is formed with the central rearwardextension 60, which extension is hollow and provided with the rollerbearings 61 on which the shaft 57 is rotatable. This cap 59 is providedwith the cut away portion 62 at diametrically opposite points which areof a size sufficient to accommodate the extensions 45 and caps 48 whenthe axle turns on its pivot.

Rotatably mounted in suitable bearings 63 at the inner ends of the axlehousing 45 and in suitable bearings at the outer ends of the tubularcasing 64 are the drive axles 65, the extreme inner ends of which areprovided with the bevel gears 66 which mesh with the bevel gears 67 ofthe differential. The differential frame or spider is designatedgenerally by the reference character 68 and comprises the key sections69 and 70 carryin the stub shaft 71 on which the gears 67 are rotatablymounted. Each of these sections 69 and 70 is formed with a tubularextension 72 which is rotatable on the axles 65 and one of these tubularextensions is provided with the bevel gear 73 which meshes with the gear53 hereinbefore described. It will thus be apparent that upon rotationof the gear 53, the gear 73 will be driven thereby causing the frame 68to revolve and thereby moving the gears 67 in a circular path around thegear 66 and transmitting power from the propeller shaft to the axle andthe drive wheel.

While in the foregoing. there has been shown and described the preferredembodiment of this invention, itis to be understood that such changesmay be made in the combination and arrangement of vparts as willfallWithin the spirit and scope of the Copies of this patent may be obtainedfor appended claims.

What is claimed is: I l.- Ina motor vehicle, a differential comprising adiflerential housing, a main differentialdrive gear horizontallyrotatable "on'the ends of the axles and a gear carried by'the frame andmeshing with the drive gear whereby when said drive gear is set inmotion the axles will be driven.

2. In a difi'erentia-l, for motor vehicles, a difierential housing, ahorizontally rotatable gear mounted in said housing, a drive pinionmeshing therewith, drive axles extending into the housing, gears at theinner end of the drive axle, a differential frame mounted to rotate onsaid axles, pinions on the frame and meshing with the gears on the innerends ofthe axles, a gear on the frame meshing with the horizontal drivegear and roller bearings supporting the drive gear and the axles.

In testimony whereof I aiiix my signature in presence of two witnesses.-

FREDERICK EL EIN. Witnesses: I

GUST.-A. MARTIN, SYLVAN L; OLSON" fivecents each, by. addressing theCommissioner of Patents. Washington, D. 0'.

